[1] The single was the last by band member Janghyun, before his leaving to serve in the South Korean military service for 2 years.

A representative of the group's agency, LOEN Entertainment, stated: "As the title track was motivated from a children’s story, it has a fun, intriguing concept with an addictive melody that people of all ages could enjoy.

"[4] One day later, on January 11, LOEN Entertainment released a teaser video featuring Brown Eyed Girls' member Narsha.

[5][6] On January 20, in the middle of promotions of "The Grasshopers Song" on TV music shows, Jang Hyun, leader of the group, decided to enlist on military services during 2 years.

Although he could have announced his enlistment earlier, he wanted to be fully committed to their latest album, which is why we are releasing this information now.